PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

43101Delay Line

L3harris Technologies, Inc. Div Space and Airborne Systems · NSN 5999-00-728-4388 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-00-728-4388 — this item is cataloged by the U.S. Government under National Stock Number 5999-00-728-4388. Primary manufacturer part number: 43101.
Features
  • Delay Line — FSC 5999
  • Body Style: RECTANGULAR
  • Segment Delay Time: 338.250 MICROSECONDS NOMINAL SINGLE SECTION 6TH SEGMENT US
  • Thread Pitch Diameters: +0.2500 TO 0.2501 INCHES IN
  • Body Length: 9.000 INCHES NOMINAL IN
  • Segment Delay Time: 276.750 MICROSECONDS NOMINAL SINGLE SECTION 5TH SEGMENT US
  • Mounting Facility Quantity: 4
  • Body Width: 1.500 INCHES NOMINAL IN
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Delay Line, cataloged under National Stock Number 5999-00-728-4388, is classified within Federal Supply Class 5999 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is L3harris Technologies, Inc. Div Space and Airborne Systems. Government technical data includes 30 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5999-00-728-4388
Primary Part Number43101
Item NameDelay Line
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerL3harris Technologies, Inc. Div Space and Airborne Systems
StatusACTIVE
Body StyleRECTANGULAR
Segment Delay Time338.250 MICROSECONDS NOMINAL SINGLE SECTION 6TH SEGMENT US
Thread Pitch Diameters+0.2500 TO 0.2501 INCHES IN
Body Length9.000 INCHES NOMINAL IN
Segment Delay Time276.750 MICROSECONDS NOMINAL SINGLE SECTION 5TH SEGMENT US
Mounting Facility Quantity4
Body Width1.500 INCHES NOMINAL IN
Longest Vertical Distance Between Mounting Centers1.000 INCHES NOMINAL IN
Segment Delay Time215.250 MICROSECONDS NOMINAL SINGLE SECTION 4TH SEGMENT US
Voltage Rating3.000 MILLIVOLTS NOMINAL
Longest Horizontal Distance Between Mounting Centers7.000 INCHES NOMINAL IN
Segment Delay Time153.750 MICROSECONDS NOMINAL SINGLE SECTION 3RD SEGMENT US
Individual Section Quantity1
Stud Length0.500 INCHES NOMINAL IN
Thread Size and Series/type Designator0.164-32 UNIFIED NATIONAL COARSE (UNC)
Segment Delay Time61.500 MICROSECONDS NOMINAL SINGLE SECTION 1ST SEGMENT US
Attenuation in Decibels14.400
Body Depth2.250 INCHES NOMINAL IN
Delay Time Variation MethodTAPPED
Segment Delay Time123.000 MICROSECONDS NOMINAL SINGLE SECTION 2ND SEGMENT US
Output Impedance Rating1.000 KILOHMS
Terminal Type and Quantity9 PIN
Segment Quantity Per Section7 SINGLE SECTION
FSC Application DataRADAR NONAIRBORNE EXCEPT FIRE CONTROL AND GUIDED MISSILE
Mounting FacilityTHREADED STUD(S)
Section Delay Time369.000 MICROSECONDS NOMINAL SINGLE SECTION US
Input Impedance Rating1.000 KILOHMS
Mounting Provision Arrangement StyleFOUR POSITION RECTANGULAR
Signal Delay MethodLUMPED CONSTANT
Thread Class2A A
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Criticality CodeN
Unit of IssueEA
SMR CodeJN
Weight2.7800 lbs
Cube0.1736 cu ft
Verified Substitutes 9
5950-00-151-741320446-1 INTERCHANGEABLE
Transformer,power
Stellant Systems Inc
6240-00-155-868349 INTERCHANGEABLE
Lamp,incandescent
Chicago Miniature Lighting Llc Dba Chicago Miniature Optoelectron
3433-00-373-17250331-0017 INTERCHANGEABLE
Tip,cutting Torch
Victor Equipment Co
5970-00-601-204743101 INTERCHANGEABLE
Insulator,plate
Honeywell International Inc. Div Aerospace - Torrance
5306-01-113-401343101 INTERCHANGEABLE
Bolt,tee Head
Jergens Inc Div Tooling Components Division
5962-01-119-469043-101 INTERCHANGEABLE
Microcircuit,linear
Hydro-Aire Aerospace Corp
5950-01-257-2109 INTERCHANGEABLE
Shielding Bead,electronic
4820-01-373-959543101 INTERCHANGEABLE
Piston,valve
Eaton Aerospace Llc Dba Eaton Aerospace Jackson
7050-01-510-42354310-1 INTERCHANGEABLE
Converter,digital to Digital
Omnitron Systems Technology, Inc. Dba Omnitron Systems Technology Inc
Cross-Reference Index
Part NumberManufacturer
43101 PRIMARY L3harris Technologies, Inc. Div Space and Airborne Systems (USA)
Related Parts
5950-00-151-7413INTERCHANGEABLE
TRANSFORMER,POWER
20446-1
6240-00-155-8683INTERCHANGEABLE
LAMP,INCANDESCENT
49
3433-00-373-1725INTERCHANGEABLE
TIP,CUTTING TORCH
0331-0017
5970-00-601-2047INTERCHANGEABLE
INSULATOR,PLATE
43101
5306-01-113-4013INTERCHANGEABLE
BOLT,TEE HEAD
43101
5962-01-119-4690INTERCHANGEABLE
MICROCIRCUIT,LINEAR
43-101
5950-01-257-2109INTERCHANGEABLE
SHIELDING BEAD,ELECTRONIC
4820-01-373-9595INTERCHANGEABLE
PISTON,VALVE
43101
7050-01-510-4235INTERCHANGEABLE
CONVERTER,DIGITAL TO DIGITAL
4310-1

Frequently Asked Questions

What is NSN 5999-00-728-4388?

NSN 5999-00-728-4388 is a Delay Line, manufactured by L3harris Technologies, Inc. Div Space and Airborne Systems, classified under FSC 5999 (No Item Name Available). Status: active.

What are the part numbers for NSN 5999-00-728-4388?

NSN 5999-00-728-4388 has 1 cross-referenced part number: 43101 (L3harris Technologies, Inc. Div Space and Airborne Systems).

What NSN replaces 5999-00-728-4388?

There are 9 known substitutes for 5999-00-728-4388: 5950-00-151-7413, 6240-00-155-8683, 3433-00-373-1725 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 43101?

Key specifications for 43101: Body Style: RECTANGULAR; Segment Delay Time: 338.250 MICROSECONDS NOMINAL SINGLE SECTION 6TH SEGMENT US; Thread Pitch Diameters: +0.2500 TO 0.2501 INCHES IN; Body Length: 9.000 INCHES NOMINAL IN. 30 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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